Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Lumē Light Meter
A beautiful, no-nonsense light meter for photographers and filmmakers — buy it once and own it
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
A beautiful, no-nonsense light meter for photographers and filmmakers — buy it once and own it. No subscription, no ads, no “unlock” paywalls. Every feature is included the moment you open the app. MEASURE • Incident, reflected & spot metering • Live EV readout with lux / foot-candles and color temperature • Rock-steady readings — smoothing kills the jitter other meters suffer from • Hold to freeze any reading EXPOSURE TRIANGLE • Aperture, shutter or ISO priority — tap to solve for any one • Full, ½ and ⅓-stop increments • Sensible film and digital ranges PRO TOOLS — ALL INCLUDED • Zone System — place any tone on a zone • ND filter compensation (1–15 stops) • Filter-factor presets (yellow, orange, red, polarizer…) • Bellows / macro extension compensation • Cine mode — shutter angle × frame rate • Sunny 16 and EV reference • Save & review your readings HONEST BY DESIGN iOS doesn't give apps a dedicated light sensor, so Lumē reads light through the camera and lets you calibrate it to match any meter you trust — dial it in once and your readings stay consistent. A fast, convenient meter that lives in your pocket, not a lab instrument. No fake promises, no recurring charges. Just a clean, premium tool you own. One purchase. Every feature. Forever.
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
